The teaching of arithmetic.
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
Appleton-Century-Crofts, Inc.
1934
|
| Rhifyn: | 2nd ed. |
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
Appleton-Century-Crofts, Inc.
1934
|
| Rhifyn: | 2nd ed. |